package com.atguigu.gulimall.product.service.impl;

import com.atguigu.gulimall.product.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;

import java.util.*;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;

import javax.annotation.Resource;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {
    @Resource
    AttrAttrgroupRelationDao relationDao;
    @Resource
    AttrGroupDao attrGroupDao;
    @Resource
    CategoryDao categoryDao;
    @Resource
    CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public void saveAttr(AttrVo attr) {
        // 1 保存基本数据
        AttrEntity attrEntity = new AttrEntity();
        attrEntity.setAttrName(attr.getAttrName());
        BeanUtils.copyProperties(attr, attrEntity);
        this.save(attrEntity);

        if(attr.getAttrGroupId() != null) {
            // 2.保存关联关系
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<>();

        int attr_type = "base".equalsIgnoreCase(type) ? 1 : 0;
        queryWrapper.eq("attr_type", attr_type);
        if(catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }
        String key = (String)params.get("key");
        if(!StringUtils.isEmpty(key)) {
            queryWrapper.and((wrapper) -> {
                wrapper.eq("attr_id", key).or().like("attr_name", key);
            });
        }

        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                queryWrapper
        );
        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> attrRespVos = records.stream().map(attrEntity -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);

            // 根据属性id查关联的组id
            AttrAttrgroupRelationEntity relationEntity = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
            if (relationEntity != null) {
                // 根据组id查组名
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(relationEntity.getAttrGroupId());
                attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
            }
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }

            return attrRespVo;
        }).collect(Collectors.toList());
        pageUtils.setList(attrRespVos);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity, attrRespVo);
        AttrAttrgroupRelationEntity relationEntity = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
        if(relationEntity != null) {
            attrRespVo.setAttrGroupId(relationEntity.getAttrGroupId());
            AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(relationEntity.getAttrGroupId());
            attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
        }

        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        attrRespVo.setCatelogPath(catelogPath);
        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if(categoryEntity != null) {
            attrRespVo.setCatelogName(categoryEntity.getName());
        }
        return attrRespVo;
    }

    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.updateById(attrEntity);

        // 修改分组关联 销售属性无需修改分组
        if(ProductConstant.ATTR_TYPE_BASE == attr.getAttrType()) {
            relationDao.delete(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            if(attr.getAttrGroupId() != null) {
                AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
                relationEntity.setAttrGroupId(attr.getAttrGroupId());
                relationEntity.setAttrId(attr.getAttrId());
                relationDao.insert(relationEntity);
            }
        }
    }

    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrEntity> attrEntities = new ArrayList<>();
        List<AttrAttrgroupRelationEntity> list = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));
        if(!CollectionUtils.isEmpty(list)) {
            List<Long> attrIds = list.stream().map((attr) -> {
                return attr.getAttrId();
            }).collect(Collectors.toList());
            attrEntities = (List<AttrEntity>)this.listByIds(attrIds);
        }
        return attrEntities;
    }

    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
//        relationDao.delete(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", 1L).eq("attr_group_id", 1L));
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        relationDao.deleteRelationBath(entities);
    }

    /**
     * 获取当前分组未关联的所有属性
     * @param attrgroupId
     * @param params
     * @return
     */
    @Transactional
    @Override
    public PageUtils noAttrRelation(Long attrgroupId, Map<String, Object> params) {
        // 当前分组只能关联所属分类里的属性
        // 只能关联别的分组未引用的属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        // 当前分类下的其他分组
        List<AttrGroupEntity> attrGroupEntities = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().
                eq("catelog_id", catelogId));
        // 这些分组关联的属性
        List<Long> groupIds = attrGroupEntities.stream().map((entity) -> {
            return entity.getAttrGroupId();
        }).collect(Collectors.toList());
        List<AttrAttrgroupRelationEntity> relationEntities = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", groupIds));
        List<Long> attrIds = relationEntities.stream().map(AttrAttrgroupRelationEntity::getAttrId).collect(Collectors.toList());
        // 从当前分类的所有属性中移除这些属性
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type", ProductConstant.ATTR_TYPE_BASE);
        if(!CollectionUtils.isEmpty(attrIds)) {
            queryWrapper.notIn("attr_id", attrIds);
        }
        String key = (String)params.get("key");
        if(!StringUtils.isEmpty(key)) {
            queryWrapper.and((w)-> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), queryWrapper);
        return new PageUtils(page);
    }
}